how to turn an iron rod to permanent maganet
Please refer to the link given below to get your answer :-
https://www.meritnation.com/ask-answer/question/true-that-we-can-make-an-iron-peice-to-a-magnet-only-us/fun-with-magnets/516543
https://www.meritnation.com/ask-answer/question/true-that-we-can-make-an-iron-peice-to-a-magnet-only-us/fun-with-magnets/516543